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3M check valve silicone membrane mold
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3M check valve silicone membrane mold
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Mold to make Your own silicone membrane for 3M masks.
NOTE!!!: Use made membranes on You own risk.
Close the mold and secure with 4pcs M3x25 (or longer) with nuts. Use syringe with luer tip to push silicone into the mold using hole in the middle. Keep filling mold until silicone is visible in all cones around to make sure the whole membrane space is full.
It is strongly recommended to remove air bubbles before putting silicone into the mold.
4cc of silicone fills up the whole mold. Prepare silicone according to the manufacturer's recipe.